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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Test method of precious metal alloys - Determination of tungsten contents for platinum alloys - Tungstic acid gravimetry
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of zirconium and gadolinium contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of vanadium and magnesium contents for silver alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format:Method for chemical analysis of precious metal alloys—Part 2: Determination of silver content
Standard published on 29.8.2025
Selected format:Methods for chemical analysis of precious metal alloys—Part 20: Determination of rhodium content
Standard published on 29.8.2025
Selected format:Methods for chemical analysis of precious metal alloysPart 3: Determination of platinum content
Standard published on 29.8.2025
Selected format:Test method of precious metal alloys—Determination of palladium content for palladium and silver alloys—Butanedione dioxime gravimetry
Standard published on 31.3.2008
Selected format:Methods for chemical analysis of precious metal alloys—Part 4: Determination of palladium content
Standard published on 29.8.2025
Selected format:Methods for chemical analysis of precious metal alloys—Part 6: Determination of iridium content
Standard published on 29.8.2025
Selected format:Test methods of precious metal alloys - Determination of chromium and iron contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format:Latest update: 2026-04-24 (Number of items: 2 274 650)
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